bài tiểu luận salmonella

 
 
 !"#$%&'()*+!(,
$()*-#

./'0&

12'-#*3



 !
"#$
%
&'()
*+,-$
456
 
 

7'*#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++8
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++9
5+!':+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++9
+(;' ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++9
8+<=6>'?6'@A#;'+++++++++++++++++++++++++++++++
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++B
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++C
5+-#DEDF+++++++++++++++++++++++++++++++++++++++++++++++++++++++C
+(G#HEDF+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++55
8+*#I+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++58
9+G::'*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++59

J+K'L+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++5J
+.*:MN*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++5J
/*'O+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++5B
46
 
 
!"#$%#%&
.$/0//$/P''Q#R1D0;'*D+
/DENSPT''-2U#'0VEF1/ED
N*#U@P1&':U@P1&': <#1/'2# +
$)Q?*'/T#:##'2'/'H1W
 +.*<.$/0//$ '&'#RDH?#:###EXU#E,%
@0Y/ZU:U,%U!/+>S*'S2#R:[
5CCJU'>SB99CN*ENLF@P#'I#[@\#'8585N*E
< .$/0//$ ED  +  ]    , #  5CCJ  #  +C55  '  ^  F
.$/0//$U'@#5C_EDN*'G/<['I#[/'I1/
#:#>O#R'INLF1/D+7`@ED?,%/[#
O9'^T#N*<'-#NLF.$/0//$ >+
[5CCC?!/aS#2#I#';DJUC_W'L'/'G>SNL
F.$/0//$+]!/8_'L'F.$/0//$>+[5
2#I#Rb.1/#P>-#';D _'L'F
.$/0//$+ .10)0#)23 *D1W@^#V/D2EEDN*
c'";''>S#:##R.$/0//$+
Người ta đánh giá rằng Salmonella gây ra hơn 25% các vụ
nhiễm độc, nhiễm khuẩn thực phẩm và 66% trường hợp tử
vong.
486
 
 
'()


.$/0//$<d+e5J65C59f :'* [5J+
[57gD@\)'OYO1c>:'@^#'2'2NO1//
@`'2E @^#.1)41/[59+
.$/0//$/1>1&''P#"
1    @  P'
5)0#6$)0#$0$01 .$/0//$ /  1
7EePNh%
'&'7'Y  1NT'  / @i
jfUYcUk#  '#O
U4UUHk1/Lk'lDmU
(  '2  U  #  '0  <  @P  e'n
.1$//$#1/.14//#fU)' N/'oUp@K:1'HN2
/>G2<V'>U>k@D@>ge!

f+

.$/0//$#N :D24/Q#;'V;'*'#G
'0'Y' k#'k#@:IF<L#1/H'^@q#*1Q>O
#R>-k#'k#@4j3:D2'ErU:D2)
!1/:D21i$+'G/e.1)47#:D2
e#f/DH'S#S'-#N/s#1'G/:''0
N2''HN/N ##`+
*+,-./0*+12)
/E#GNO/1:#'HN/##;'s#I#' j+
#l/P''<D#iU#:#P')##;'1/'
  /  /  e'  Nf  /  I#  ^  <D>##<  j
'1/D>##<+
496
 

 
.N2/'<D#/><Z1/.ecDH'@L
@P#'S#RP@P#'SfU>@/D>##<)'k@q#
*+$:D2#RP@P#'S#NO#;'"#/DD>##<
ef+k@q#*#R:D2r1//P'U'kF
<L# 'Y  :#    3 :  D2 r  /    #M N  j  #O 
'<D#2'k>F<L##R G+
,//##;'s#`S'HN/#;'><`
#tq?'U#M?//D>##<</DO4
5j8'/`3
4 <Z+
4 D>##<u+
4 $:D2r+
,//#M#'2#:#'3
4 '#G#;'3?1#M"/'vVD2/1
#I#[#pP'>S E'o@c#s<'<U
<>##<U#:#1)#G+
4 '//3#I#[1&#D0P'>SE'o2N*'1/
@c//+
4 '3@1'M2H''<D#N2'1
//+
 NO#;'
"##R1i1/D'<q#D>##<+i#R1ED
F<L#) T1'HN/11i1WED@^#
F<L#+$:D21i@^#<l@0E #:##R.$/0//$1
! @^#'A^'n#:#
#<< e< k'q''-2f+@1*#Vom:D2
#R#:#'HN/F<L#)'&^1/@:I:'0) +
$#:#>^)NLH'^N?#:#:'0@q#*U)>wNLN;'@PU1
4J6

 
 
)'0<#D0@^#+$:D2)@^#<l@FE 
P'>S#R.$/0//$1
"#$%&'(%)*(+,-
.$/0//$p@K:1@K*N2/UNL:RDN?c:
'Y'*''lNhG:>'U'NI#V 1/@>);x+D
2.$/0//$#'0>S>''P''</?#:#'-#)
1/ +@/''-#@) 1/D<F:'
'0'? +
(s:''0'S'?*'@P

(69

(U'k#^;'?8J

(6
8B

(U!'n6C1/'k#^;'?!yBU+
]*'@P'n5

(69

(1#'0>S@H5J/D+>)
# 

(  '  5  s'  D  5

( '  s'  @\  <*'  @^#  `  H'

.$/0//$+(sNL '2 <*'N?J_U#5_1/#'RD
EU_'Js'+
.LI##H?j@PS5_1/N?*1#'#+j@P
S5C_1NL#H'>BJ6/D+
)#;D<F</1/'['?')'@GOU
)'/DO@R#;'<<=U1 '@P#ZbyUC8+
/D)EDl1L#L#'-#+
.$/0//$#O[2#z1/'U>#<
)2>##>1/#'>U)EOU)#O[
':#'n'D'+ .$/0//$ )><U)/
i'+(O[o'''/'#+
S'S'?)'N2/U#'0>S@^##O1@K*NO
cOUSUk'#+#O[#L@^#:>+@K
*?*'@PNY'U1'P#.$/0//$>969#
'0';>1/'L'@^#59#+
46
 
 
314"#56&  '7)
(@HD@\V:#@L@^#88C>'De0DH''f'P#
S.$/0//$+(:#>'D/D@^##'*'S$gg6{'
<- '2  #)  'I# : D2    e:  D2 'f 1/  :
D2'2!e|f+/P'>S>'D@^#@q''22
5)0#)23  8.10)0#)2379  4  8.1)479  $#$)4  8.14$#$)479
4#8.1)4#7:`H'#:#>'D:#@^#m*Nh
#)'I#:D2+
/NP/.$/0//$@K#O[EDN*#RDH'@
'2+lD'n/U.$/0//$ #'0#tEDN*#U#tED
N*#@P1&'1/1nEDN*#1nEDN*#@P1&'+
.$/0//$@^##'/#R3

;.10)0#$3#/}3
~.10)0#$•
~.10)0#$••
~.10)0#$•••
<.10)0#$•••N
~.10)0#$•
~.10)0#$•
4+Ne.$/0//$f
.$/0//$ '  @^#  "  '2 '  0  DH'  '3 .1 )4U .1
0)0#)23U .14#€(:#0DH''EDN*#RDHh
'.10)0#$•+
Q/.$/0//$EDN*#'@^#c'E/3
4 .1)4 e'-# dN'U5f3 #tEDN*#U/#[
D2EDN*'G/c'";'+
4B6
 
 
~ .14$#$)4= 3#tEDN*#U/#[D2EDN*
'G/U'•*EDN*?#'@I>.1)4+
~.14$#$)43#RDHEDN*
?+ #:###EU'•*1
/DEDF;'#+(s/#[
D2EDN*'G/+
~ .14$#$)4> 31n#O[
EDN*'G/U1n#O[ED
12< </DUP'1/FDH'+
q?#:##)#E‚+
4 .10)0#)23 e'-#7'U5f1/ .1)4# e'-#
#<U5Cf31n#O[EDN*#1n#O[ED
N*#@P1&'+(s/D2E#RDH#RN*F@P#'I#

[<.$/0//$+
4 .1/0#$033 3/#[D2'q'FDH'<
.$/0//$?#'+
,P'>SN*'q?@P1&'<ED3'G/?
NM1/^UN*>D'?#n1/-UN*N #ƒ?/UN*'G/
#P'UN*12ANM+++
,P'>S#R.$/0//$:#3.1)439.120#69.10?4#)9.1@33$$9
.130A/060#9.10/0$239.1$$)9.1$60#2009.14$$$9.1)0B209
.126/9.1/29.1$$)9.103)$9.1$//$#€
46
#CD)E.$/0//$)F
6)#6GH32IJ$$
K
 
 
#8&9&  :;<)
* /0120
I#[NLF .$/0//$'/<)@^#NOcO%U
)kNL)FU'c:'Y>OV;'K1&'k>U'
EDN*:Uj+!D'#:#j#NLFN)@^#
(+
(:#>O'L'#U;'/'L'#`1/'L'^+;'#O#:#
'I#['G>S#jS#@P1&'@K#'0/j1
.$/0//$+/D>S'-<'P'@P1&'1/#'2)+7
#`#K .$/0//$ ;'U'H'/#:#@P1&')'/1/
@P1&'e1„'UlU#UH#U#)N0U/q;UTf+
/D#'0#''/`<WV;'#:##;''n@P1&'
'q##N"'@P1&'UN?#)
'lU/q;U#q##:#>O
  'L'  F    ED  F  1/

'-#+/#'0NLF'n
i #1/D+
-##jS#'-#1&'k'#
D#GF+Yk<NLI##H
N?!…91/#q'1#'#2
#:#>O2k'NLF+
I1/#:#>O'I1k<}
NP'/U#>S'D>U''
@)'}':#'n>Q+#s'@::U
#`/jK .$/0//$U
2'I#R#†NLF1Y1/D#'0VD2c1i'I1/
>>O'M@i'I+^/D):<}@^#0'
'l>'UQ'P1DO0'%+
4C6
 
 
(:#>O>Q>Q)''lU:''n>Q'GU
#;'Np>QU1/#:#>O'n>Q#@^##HNH'n#:#)' U
#:#'H'NL@K#'0EDF1/D2*U' )''&^
#.$/0//$U1/'n@EDF@P##>O>Q+H'H/V'
#&'Y1<F</>>O':'NL:RD1
!…9UJe@P!Zf+Q>O#>QO@^#:>:'#q'#w
N?#s)@^#''lQU1Y1&DH#.$/0//$'>Q
NP''Y#s1W#'0>>O@^#N?#s#O['j' ?@K
*) 1/EDF>#:#>O:#+S1##1/>#3
(#  @^#    #M  >#  @^#  '  'l  >'  @R  @0  '2  <*'
.$/0//$9 #†#'0>@\''l#M>' .$/0//$ '
>#+('^F'n#;'Np#R>Q`/'n'I
'GNA>1/#:#@j[+
#NLFN?<OE>s#1&'1/#:#@jN0'G>Sq#

#@R#kU@q#N*'/@P1&''EKUO1i?#:##@:'
'0U#)*+#U/L#B$#)4FK;'1/
@P1&''EKU#)cVom(UDENL'G/+
!cO1/V3#'0NLFoNh#@\NLF
q#N?o1+.$/0//$>>O'S''cO
<n1/#'0#L@^#*'@P''l>')@`D@Rq#NL
F>''l+!D#'0NLF'n#':)''l+
O†#S#3'n@&'GU#i[U†#S##HNH1/#:#
1LUN:YUNP'@&'G#'0/j$/0//$<NLF
'n'j<NE1/>OV;'/E''</?*'
@P'+H<lQ>O/DD/)Vom*''Y#
D#GNLF$/0//$+^†#S#@^##HNH1/#:#
1LU#'0>wNLF'nD2*3'IU>QU1'U#;'"'
1/#;'' /+
456
 
 
(:#'-#[ N:#'L'U>Qq#'IU#'0NL
FU;'/?*'@PNY'+
-#F.$/0//$)NLEO)'U@q#'k>
)NL'D@A2' ':#Oc'-#;':'*+
3-4120
;'  #O  #:#  0  DH'  ' .$/0//$ @K    #}   B
e1>fs#c:'YVEF1/''/P'#R1/
@P1&'U?@`#R'H'YEDN*+(}/Dh'*'S
  •  4  5  e.$/0//$ '#'D  ><f  #  q'  '  ';'  #O  #:#
.$/0//$9'n'H:';;'/.16#@H'H:#
;'/.10)0#$•+MB=/P'NO)#q''*'SB1
4556
,W

)#;D//8B

('9 )#;DE&8B

('9
,)'•
,P'@0'
<uH'cO49
e4fDH''.$/0//$
@:
e~f'>
k*
!"#
e~fDH''@G:
'k*"#
e4fk*
>1&'"#
.:#:H'cO
>H@E)#$.$/0//$)#)N4O66(
 
 
-VEF.$/0//$1/#G'01&'#R1/EDN*@^#'-#
*#RDHc@'2:1N0*ANH;'/ED'2#ODU
@)/'G/1/'G/+
.$/0//$ #RDHEDN*NhP@P#'S+P@P#'S#L@^#
*'@P>)1/)NLERDN?'>U'k:D2DH1/
)>OV;'@^#'/:D2+:  @P#'S
0EDN*U.$/0//$VE&1/#G'0'@'2<
'I#[U#SNLFNU>S^@0EDN*#tO5
J

@H
5
B
+  (:#  #R .$/0//$ '>O  >   5 ''V  # NO #;'
D>##<1S#O[':#@P@HK):#U@H#:#
#I#[#R)+D2''^F@P#'-##;'@P#
/D#t#':#<}@^#O1/'P''nQ1
>S1/@'>>O+$[#:#N/'o>S'Y#'0>N*
>[#:#1@\NL#H'<*''Y)NLO?Y+
@1/S'2U1N:1/2 #P'j
VE&c2 #1/#:# # #'2P'+]@EDU#sE2j
c*'SN #DH'1/S-#@1/:Us#/D<;*E>/NT'
@`V;'*+n:U1@H::#1/#:##Gc:#3
~/DU1'H'}#E2+
~'&'@AVSP'j@^#@/'OcE+
~'&UP'>S1@^#@/'O/'#'0+
.$/0//$EDN*Nh>-VE&#RNO'E1:RD
'A#I#'HN/NhP@P#'S#R.$/0//$NL#H'+
P@P#<.$/0//$#`#@K*3
~I#[OFP'^1>SU1Y'k#;'EDP@P#
#R1;'DH
~1/#G'0O'H'P'^@P#'S+

456
 
 
"*(5-6
P@P#'Sk#'k#'`#O?P'ED 'oU#OD:U
1L'k'A'G'?#:#/D+('0qNH#I'RP'
<N*E[>#NY}#U;'/#:#'I#[#I+

RN*'n6Be'NY'n568fUP@P#'S'
:2k#'k#''E'`'-#1&'?\';'N+7@ '/
:''E*''[#L')'[+.*E'#<;
*NYU*'iU#:[Uq'':^'U)UoU@N}UV;'*Q
N@i>1l'T'U#'0)2+QNLFN*
.$/0//$#'0#'*#I„q#)#Y#O+
S'8C69

(#'0p</86B/D6<;*@0Y #1/
*'@PEDeHqf+N}U@/E`DU@K`'
/D+
2V;'*869/D>T#N*+
.*EH)@^##;#IL'#'0NL'o1e't*
…5_f+K'Y)L'U)@RK1/@s:#@jUNLN*
#'0H'#:#'*#IE>/'?'//'l<
1#M'j' ''s&'+@^#@VSP'''n
@^'#N#R's&')ED'A'G#N*1
)@^#'O/1P'^+
ED/jEDF;'@S1)'VcU@q#N*'
D0HQ/D'HVs#1/c:'Y#HNH'-#+
,P'>S/.$/0//$#tEDF? #
'0ED'Y' N*m;'q?'‡i1/'‡>G>F
DH'UF'lU12/\+

4586
 
 
78%35
.$/0//$#'0@^#:'*eE'k#@L'kfNhP'cD
'Yj9N#/'[>U'[>#""#UE&1/ˆ@L+

.$/0//$'#q''W1>S^iUNL'A'G1/#l
*  <*  #  1  P'  >S  ^    1    :#  'P#  "
5)0#6$)0#$0$0 #'k# ' 1/I##H>->'?#R
.$/0//$+
'@\:''0;'KG:'o@0:'*
.$/0//$'#:#W'-#1/W#''TU'n@
#N*:VomL'@S1#:#WF+‰>o<}(Š1/
•,'@^#>o<}+G:(Šs:'*‹'D2
<FVOD *'^E'kOU@Mi #:#' ':#O'/' +
,'V(Šs'H'*'U>S^W1/#k‹'D2 
#@P DpG+'@\:''0'2G:Š
(Š'n(Š'DK'S+G:/D#@P D;'#U#H'cO
>GU)#`O# D@*<>OIH#@ +G:
F<L#'nE':#/P'-#"'S'G+#@P D#e…5
9
(|Œ•fU'Te'k*@^#'-#*'94Jf+
.2# Q%'&'"#E'o#GNO@0:'*1/@L
< .$/0//$U#M#QG::#U3G:)
#;D'DK'SUG:F<L#eDH''"#U%'&'d•ZU
{>'N'f+/@)@0'[*cOU@P'#&D#Vp'*'
#M  H'  ^  K  G  :  1  U  1k  <}3 •,4(Š  >>D
e•'#'<D>(Š#'f@0:'*
.$/0//$''-#+

4596
 
 
9:;(<
Q:>'@^#<l@0@K'L.$/0//$
/##1/#+#@EDU##/ :

>#*-#`'D*'@S'@K'L#:#.$/0//$#1/
#:#.$/0//$EDN*'G/2+D2#s'#`#sm
@HD2'T##GNO3
~s#@`)@^#<lK'S#c: ' 1Y'H#'0<*'1
/#sOK@P#'S#'0D @H'U'`*/
N*E#'0#H'N;''`+
~2<l'S#'n56'`F> *'1Y1#M'S
' #D's&'<F#D#G'::'>/D+
!*DU'•*.$/0//$$//$#:'S#/D#/'[+]#'U
Q[`@ED@\V;'*Q1}<L#'G/<1:
'S#ED2+H'cO#R(G'YcS#:>:''k:
'S##R#:# 1EDN*#)NS[5CCCU@\#'9_ .1
)4 eE  &  [  5CCf  :     #  1/  _  :   
##+
=>5?@5
*>EU#U:#+$)['I#[>SU)S>Q#
'*''l+))o'D'&'%NhV/N)'#[U'#1/>
/@j[1/>@#`U'D'\q##G1's)'/+
;x'-##jS#@P1&''#[@q#N*'/'L'
#`U'L'^U'Iek';'/@'B

(fU)<l'I>Sq#
#;x+.I#V '`>S#1/V'3#H'NI#V 1/'L'#`/
G:*cOh:RDU'2<*'$/0//$+!GQU1
/D)>>O?!…9+
/ '-#31/D>>O#&'O*'@P
J65

(1/?*'@P'+(k1Yk<@/)2@0E
45J6

 
 
''R U;'/?*'@P'+L'@) O@^#/'i
M #I)@^#oNh*'@PMDNh#;+
.OcO'I#[@\;#k'#:#P#Ii+:ED':
F1'NH>'I#[@\@^#;#kU@0'-#'G
>S21'-#;#kU
'1*>1/:>:'#'&#:#MAU#:#/:D#HNH
'I#[U#:##o/'L''I+
I#*@scD#H1*>'#:#E>OV;'1&#D0U
NOcOU<-'Q
VD20'>I#i#HNHq#'HVs#1'-#
UVp'*E@0>:'*#:#D1/@K'L/
'l+
D2'DK:<}#1*>U[#k4S>)Uo'D'#[
1/>@1*>+
1l#KT#N*q#1lNL†}'U)F)
'q#`@^#>:'Nh<<L#(.U1)NP'+]Q
GN*'G/'VD2VOD2'2MNh1##U'lD
'n*-##R'n 1###'0'2T# >4J[+
o<}#VMN*'G/<.$/0//$ED
@^#>o<}#I:D2#R.1)4@1/#G'0Nh@
'215KJ#*-#NO1*B_+
 *'# #V'G/'>o<}3
~#V'G/'2eŽ#'f3'2'G 46‰*
./(H>',V('6:+
~#V'G/•'D(6ŒS+/N/#H.D.
(+7'<6!/aS#

456

 
 
/*'O
1 A/BC-;7+2[R+
1 A/BC-47+2!j!+
1 ADP/LD*+
1 EF+F- /067+`:+
"1 8%31G-AD(%H-I /0JKL
/06`#
%1 EM@50;5+H%NO6.DF()mU+.
DFD
&1 *G50ADC-6DFI#^+
*1 !5ADe&5Uf6DFI#^+
Q1 AD%3  /06GI#U†$†+
R1!5AD6GI#+
1AD /0=>*?0@A,B+*C
DAEF67+DFlHU7+.l
,I#U7+DF[L+
1:F-PC-JJ /062"#s
1*Q+RBC-67+DF/
1S$@(    T($I  (-    $  -( 6
{+.#NU'•+,+
"1 K-(@    0  8(- 6  d  {+>'U  >
7+Z<>U(+d1>ŠN'>•U#D+Ž
%1''3••bbb+N'4>+#•
&1''3••+b<+•b•
*1''3••bbb+b+'•'#>•>••
Q1''3••bbb+#<#+1•>•
R1''3••bbb+'V'NgN#'D+'•>+'
45B6

 
 
456